I have had my Raptor V2 for 3 weeks now and have just gone through 5 litres of fuel. Then all of a sudden my helli shook and slowly came down.. Now it has NO POWER to lift off. I changed the fuel lines and Im still running the same fuel. I changedthe glow plug twice. It was running perfect but now the motor is harder to start and revs but when it comes to lift off the motor just slows down. Please help me...

Supa Tony